Magnetic separator



(No Model.) U 2 Sheets-Sheet 1. m

J. WENSTROM. MAGNETIC SEPARATOR.

Patented July 14,1891.

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J WENSTROM MAGNETIC SEPARATOR,

atented Ju1y 14,l891.

m h R UNITED STATES PATENT OFFICE.

JoNAs WENs'rm'L-n, or oREBRo, SWEDEN, ASSIGNOR, BY DIRECT AND MEsNn ASSIGNMENTS, or TWO-THIRDS TO ()LOF wENs'rRoM AND WILLIAM w. MANNING, or MARQUETT J, MICHIGAN.

MAG N ETIC SEPARATO R.

SPECIFICATION forming part of Letters Patent No. 455,809, dated July 14, 1891.

Application filed December 24, 1890; Serial No. 375,753. (No model.)

To all whom it may concern.-

Be it known that I, JONAS \VENS'llRM, a citizen of Sweden, and a resident of Orebro, in the Kingdom of Sweden, have invented certain new and useful Improvements in Mag netic Separators, of which the following is hereby declared to be a full, clear, and exact description, sufficient to enable others skilled in the art to which such invention appertains to make and .use the same.

The invention relates to machines for separating magnetic particles from ore, slag, brass filings, or other material, and is designed more especially to improve the construction of separators set forth in my Letters Patent No. 373,211, dated November 15,1887.

The nature of the improvements will appear from the description following, and be particularly pointed out by claims atthe conclusion thereof.

% [Figure 1 is a view in front elevation (parts being shown in vertical section) of a magnetic separator embodying my invention. Fig. 2

is aview in vertical transverse section online 2 2 of Fig. 1. Fig. 3 is a viewin vertical longitudinal section through the core of the electro-magnet. Fig. 4 is a detail view in side elevation of the frame whereby the magnet and armature-barrel are sustained. Fig. 5 isa View similar to Fig. 4, but taken from the opposite side of the machine. Fig. 6 is a view in vertical section on line 6 6 of Fig. 4. Figs. 7 and 8 are fractional views showing the manner of forming the ends of the armaturebars. Fig. 9 is a viewof aportion of the ring or flange of the armature-barrel.

By my present invention, as by that set forth in my l1ereinbefore-mentioned Letters Patent, the separation of the magnetizable portion is effected by feeding the mixed material, reduced to proper size, over the periphery of a barrel or drum that is composed of armatures of soft iron suitably insulated from each other, these armatures being brought during a part of the revolution of the barrel into the field of a powerful electromagnet, so that during the time the armatures are thus magnetized they will serve to retain the magnetizable portion of the ore,

while permitting the non-magnetizable portion to be deposited separate from. the parts temporarily attracted by the arm attire-barrel.

One feature of my present invention consists in improving the means whereby the armature-barrel is sustained.

Another feature of my invention consists in improving the construction of the electromagnet,wh ereby the magnetization of the bars of the armature-barrel is effected, and in providing means whereby the counterpoise of this magnet is secured and an adjustment of the magnet is'obtained in order todetermine with exactness the intensity of the field of magnetic influence. 7 I

A further feature of my invention is to improve the mechanism whereby the ore is delivered to the periphery of the armature-barrel, and, finally, my invention comprises details of construction, all of which will be hereinafter described by reference to the accompanying drawings, and pointed out in the claims at the end of this specification.

A designates the armature-barrel; over which the ore to be worked after being crushed or broken will be fed, this barrel being preferably rotated by mechanism to be presently described. The armature-barrel A has its peripheryformed of the series of softiron bars B B, these bars being spaced by means of non-magnetic material, preferably bars of wood (I, interposed between them. The set of armature-bars B, by preference, have their ends reduced and threaded, as at 1), these reduced ends passing through suitable .holes formed in the non-magnetic flanges or rings D, preferably of brass, and there retained by means of set-nuts Z'). The set of armature-bars B have preferably their ends squared to abut against the flanges or rings D. The armature-bars l5 13 are each cut away to form inwardly-projecting portions, as shown, the projecting portions of the bars B alternating with the projecting portions of the bars B. The purpose of thus alternating the projecting portions of the armature-bars B and B, as will presently more fully ap-- pear, is to enable the set of bars B to be influenced only by the positive or north-pole plates of the magnet, while the set of bars 3' shall be influenced only by the negative or south-pole plates of the magnet, thus giving to each bar a magnetism opposite to that of the next bar, and thereby creating a powerful magnetic field throughout that portion of the barrel that is exposed to the influence of the electro-magnet.

\Vhile the form and arrangement of the armature-bars are preferably as illustrated 1n the accompanying drawings, it is obvious that the skilled mechanic can Vary thisform and arrangement without departure from the invention.

The flanges or rings D, to which are secured the ends of the armature-barsBB', are furnished, preferably, with inwardly-projectng ribs or ledges d d, between which the armature-bars will be held, and by preference also with the transverse ledges d to better strengthen these flanges. The outer portion of the flanges or rings D are bolted, as at 2, to the barrel-disks E, these disks being furnished with hubs e, which afford a broad bearing for the barrel. Within each of the hubs c is preferably placed a lining F of Babbit-metal, that sets over the barrel-supports G, that encircle the journals 72, projecting from the ends of the magnet ll. Each of the supports G is furnished with an outwardlyprojecting flange g, provided with bolt-holes g, and through these bolt-holes pass the bolts 3, whereby the supports G are connected to the standards I of the suspending frame. Upon the outer ends of the journals h are placed the magnetic sockets K, having the flanges 7c, provided with holes to receive the bolts 3, whereby these sockets, as well as the barrel-supports G, are connected to the standard I. That portion of each standard I adjacent the opening for the journals h is furnished with the horizontal ribs or extensions 5 and 6 (see Figs. 4 and 5) and the vertical ribs or extensions 7 and 8, the area between these several ribs orv extensions being such as to permit a slight adjustment in vertical direction of the supports G, that sustain the barrel, and an adjustment in horizontal direction of the sockets K, that sustain the magnet H, through the medium of the journals h; The holes in each standard I, through which pass the bolts 3, are simply large enough (say one inch) to receive the bolts; but the boltholes of the barrel-supports G and magnetsockets K are somewhat larger (say one and one -half inch) than the bolts, so as to permit the adjustment of these plates. Through one of the flanges 6 of each standard I pass the set-screws 9, whereon the bottom edge of the supports G rests, and upon the upper edge of this support bears the set-screw 10, that passes through the upper rib or flange 6 of the standard I. Through the vertical ribs 7 of the standard pass the set-screws 11, these screws bearing against the edges of the magnet-sockets K and serving to adjust the sockets in horizontal direction.

The magnet H is provided with a series of flanges or pole-plates N S, a portion of the peripheries of these pole-plates corresponding in curvature to the inner face of the barrel and extending in proximity thereto, while the remaining portion of the pole-plates or flanges is reduced, so that the magnetic field shall extend around a portion only of the armaturebarrel. The core of the magnet H is preferably set eccentrically with respect to the shafts h, in order to bring the magnetic poles in proper position with respect to that portion of the barrel to be magnetized and better remove the remaining portion of the barrel from the magnetic field. In order to counterbalance the magnet thus eccentrically set, I employ a suitable counterpoise L, preferably of lead or equivalent material, this counterpoise being furnished with arms Z, whereby it can be conveniently bolted to the pole-plates of the magnet I-I. Between the pole-plates or flanges of the electro-magnet are coiled the insulated wire-conductors x for the electric current, and the shaft h and flanges or poleplates of the magnet-core are suitably perforated, as at 72, to admit the wire-conductors at, and these conductors a: are wound in such way that the electric current through the wire shall excite like magnetism in the same poleplates and opposite magnetismin successively adjacent pole-plates, thereby intensifying their magnetic force. Thus, for example, if the first coil is wound in such manner as to give a negative or south polarity to the first pole-plate and a positive or north polarity to the second pole-plate, the second coil of wire will be wound so as to impart a positive polarity to the second pole-plate and anegative polarity to the third pole-plate S. Hence it will be seen that the adjacent pole-plates of the magnet are of opposite polarity, and consequently the series of arm atu re-bars B of the barrel present their extensions to the positivepole plates N, while the series of armature-bars B present their extensions only to the nega' tive-pole plates S, and as a consequence the full force of the various pole-plates of the magnet will be exerted upon'the corresponding armature-plates of the barrel. My purpose in providing the adjustable sockets K for the shafts h of the magnet and in providing the adjustable supports G for the barrel is to enable the intensity of the magnetic force upon set-screws 9 and 10, the intensity of the mag-- 120 the armature-bars to be varied, as desired, to j netic force at the upper or lower part of the field can be varied. This adjustment of the sockets K and supports G is obtainable by reason of the factthat the boltholes of these parts are larger than the bolts 3, as hereinabove described It willbe observed that while the shafts h of the magnet pass through the barrel-supports G, these shafts are of somewhat smaller diameter than the interior diameter of the supports, and consequently a vertical adjustment of the supports is permitted while the shafts remain fixed. The shafts h are snugly held in the magnet-sockets 7c, and are retained therein against rotation by means of suitable pins 71*, passing through the sockets and into the holes h at the ends of the shafts. h. It will be seen that one of the-barrel-disks E is formed with a rack-bar 12 about its periphery, with which barmeshes a pinion 13, keyed to the driving-shaftM, the bearings of this shaft being preferably formed in suitable extensions I, projecting from the standards I, that support the magnet and armature-barrel. The standards I are preferably connected together at their base by a suitable tie-rod 15, and the tops of these standards I and the tops of the extensions Iserve to support the hopper O, that is bolted thereto, suitable brace-rods 16 being preferably extended from the flanged edge of the hopper O and the flanged edge or side rib of the standards I. Beneath the hopper O is the feeding-pan P, that is suspended by means of elastic bars R, preferably of wood,that are bolted attheir lower ends to suitable ears projecting from the pan and at their upper ends to corresponding projections from the side of the hopper. Motion is imparted to the feed-pan P from the drive-shaft M by a tappet-wheel M, that contacts with a block M mounted within a shoe m fixed to the bottom side of the pan P near its front edge. The extent of movement imparted to the pan P is determined bymeans of an adjustingscrew T, that is sustained within a socket V and is operated bya crank 25, the rear edge of the pan P being provided with a buffer WV, adapted to contact with the inner end of the set-screw T. This buffer WV is preferably of wood furnished with a metal cap 10 and held to the pan by means of an angular strap to, bolted to the pan, as at 10 From the foregoing description it will be seen that when revolution is imparted to-the drive-shaft'M the tappet-wheel M will contact with the wooden block M at the base of the pan and will impart a reciprocating or shaking movement to the pan against the force of the elastic bars R, whereby the pan is sustained, and hence as the ore is delivered from the hopper 0 onto the pan P the shaking movement of the pan will cause the ore to be uniformly distributed over the periphery of the armature-barrel A. As the ore is thus delivered onto the barrel A, it Will be carried downward by the barrel, and as the armature-bars with the ore resting thereon the barrel and away from the magnetizable portions of the ore. I

Other means may be employed for effecting the relative adjustment of the armaturebarrel and magnet without departing from the broad scope of my invention, and in various respects the details of construction may be changed by the mechanic skilled in the art to which the invention relates.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1'. In a magnetic separator, the combination, with suitable armatures, of a magnet for said armatures, and means whereby the distance between said magnet and armatures may be varied, for the purpose set forth.

2. In'a magnetic separator, the combination, with suitable movable armatures, of a fixed magnet past which said armatures are arranged to move, and suitable means whereby said armatures and magnets may be adjustedwith respect to each other.

too

'3. In a magnetic separator, the combination, with a stationary magnet, of an armature-barrel arranged torevolve around said magnet, and suitable means whereby said barrel and magnet may be adjusted with spect to each other.

at. In a magnetic separator, the combination, with suitable standards, of a stationary magnet, adjustable sockets for sustaining said magnet within said standard, an armaturebarrel wherein said magnet is held, and adjustable supports for said armature-barrel, substantially as described.

5. In a magnetic separator, the combina tion, with suitable standards, of a magnet sustained by said standards, an armature barrel wherein said magnet is held, and suitable barrel-supports encircling the shafts of the armature and whereon the barrel may be revolved, substantially as described.

6. In a magnetic separator, an armaturebarrel comprising a series of soft-iron bars having threaded ends and a ring or flange through which said ends of thearmature bars extend, and suitable insulating-bars between said armature-bars, substantiallyas described. V

7. In a magnetic separator, the combination, with an armaturebarrel and a magnet eccentrically sustained within said barrel, of a counterpoise for said magnet, substantially as described.

8. In a magnetic separator, a feed mechanism comprising a delivery-hopper, a feedpau provided upon its bottom sides near its front end Willi a block M and a suitable tappet-wheel arranged to contact With said block M for imparting a shaking motion to said feed-pan, substantially as described.

9. In a magnetic separator, a feed mechanism comprising a delivery-hopper, a feed-pan, and a suitable tappct-wheel for imparting a shaking motion to said feed-pan, said pan being provided also at its rear edge with a buffer and an adjusting-screw arranged to contact with said buffer for limiting the extent of movement of said feed-pan, substantially as described.

10. In a magnetic separator, the co1nbination, with a magnet and its armatures, of a frame having standards for sustaining said magnet and armatures and having extensions, a drive-shaft journaled in said extensions, and a hopper connecting said uprights and extensions, substantially as described.

11. .In a magnetic separator, the combination, with a magnet and its armatnres adapted to be moved over said magnet, of standards for sustaining said magnet, a hopper connecting the upper ends of said standards, a feedpan for delivering the ore on to the armatures, and a suitable tappet-wheel for imparting an adjustable shaking motion to said feed-pan, substantially as described. u

JONAS WENSTROM. "Witnesses:

V. VVELLJ DAHLGREN, ERLAND BOGREN. 

